Motor-driven sewing machine



F LHEMLEB. Pw'nOTOR DRIVENSEWING MACHINE.

AEPL CFHOI FILED JULY I8 1913 1,469,950. Patented Mar-21,1922.

3 SMEfS-SHEET I.

ATTORNEY Q5 WITNESSES:

M. HEMLEB.

MOTOR'DRIVEN SEWING MACHINE. APPLICATION FILED JULY I8. 1919.

'Patnted Mar. 21, 1922. I

.lSHEETS-SHEET 3.

INVENTOR ATTORNEY hlhllTE-D EARTH? KEHLEB, GI ZELIYABETH, NEW' JERSEY, ASSZGNGR TO THE SZNGER ZtzIAIIU- FAQEEUBDIG-GOMPANY, A CGREORATION 01E NEW MOTOR-DREVEN $E'WING BEACHINE.

Application filled July 38',

To all whom it, may concern: v

Be it known that I, hianrm Harman, citiieu of the Unifed fltates residing Elisa hello, in the county cf'llnion and State of New Jcrseyghave invented certain new and useful Improvements in Motor-DrivenSewing Machines, of which the following is a specification, reference being. had therein to t. e' accompanying drawings;

As her LCfOfG constructed. motondri en sewing-machines, more particularly of the portable type embodying the usual sewing head and carrying case therefor, have econ provided with a motor speed controller in the 'form of a treadlc operated rheostat which is adapted to be placed'on the floor beside the table or other support for the sewing machine and within convenient reach of the operators foot. When transporting the machine from one place'to another, this controller together with the usual connecting wires must be made up'into a separate and rather bulky package which renders the complete outfit troublesome to carry around. Moreover, a foot controller of the type indicated is easily shifted out of place and is not, under certain conditions, as sensitive or responsive to the wishes of the operator, as

' might be desired. 1

An object of the present improvement is to provide a power operatedsewing machine with'a motor speed controller which is easily manipulated and free from the foregoing and other disadvantages of prior sewing maobjects, as will hereinafter appear, the in-' ention is preferably embodied in portable sewing machine including the usual carrying case, the base of which is preferably pro vided with a partition dividing it into two compartments, within the smaller of which Specification of Letters Patent.

.1919. lieriai No. $11,855.

come ignited. from sparks at the usual controller contact points.

An operating handdever is provided. fomanipulating the rheostat, and an important feature of the present invention is the disposition of the handle portion of this lever along the front edge of the sewing machine bed-plate, the handle terminating close to the line of seam-formation and being shiftable preferably back and forth, in and 'opposite to the direction of feed, to stop, start, or change the speed of the machine without necessitating relinquishment of full manual control of the fabric being stitched.

In the accompanying drawings, Fig. l is a side elevation, partly in section, of a portable electric sewing machine embodying the present invention. Fig. 2 is a horizontal section through the standard of the sewing head showing the base of the porta -ale cabinet and motor controlling device in plan. F 3 is avertical section through the carrying case and controller and showing; the rearward end of the sewing, head in elevation. Fig. 4: is a. plan view of the speed controlling device or rheostat. Fig. 5 is a detail elevation of a coni'iection block mounted within the controller compartment of the carrying caseand Fig. (3 is a perspective View of the complete outfit ready for transportation.

As a matter of preference the invention is disclosed as embodied in a portable sewing machine outfit,'althoughit is to be understood that the invention, in certain aspects, is not limited to use with a sewing machine of the so-called portable type,

In the accompanying drawings 1 indicates the rectangular hollow base of a portable carrying case to which. the usual arched cover 2 is secured by means of the hingelike catches 3 and lock 4-; said cover being provider] with a handle The hollow base 1 is divided by means of the transverse partition 5 into a relatively large compartmentadapted to receive the plug 44 connected to 6 and smaller compartment 7, the former being bounded by the four walls 6", Fig 1, which terminate at their upper extremities in a rectangular ledge 8 upon which is seated the rectangular cloth or bed-plate 9 ofthc usual Sewing head A which further includes the standard 10 and overhanging hrackeharm 1.1, in the enlarged free end of which is journaled the reciprocating needlebar 12 carrying. the needle 13.- The bracketarm also carries the presser-bar 14 to which the presscr-foot 15 is secured in cooperative relation with the usual feed-dog 16, Fig. 1, which operates to feed the work along the line f, f, Fig. 2. The sewing head A is thus 2 m he carrying case.

housed, entirely within the base 1 and cover "wardly extending bracket 17 carrying the dri'ringmotor 18 having its driving pulley 19 in frictional engagement with the usual haudwwheel 20 of the sewing head A.

metallicreceptacle 20 which is secured to thehottom of the compartment 7 by means of screws 21 and which includes the removably fittedjcover 22. Housed within the receptacle 20, is the resistance element 23 comprising the usual contact points 24 and swingingeontact'arm 25 carrying the contactor 25 and formed with an aperture 26 which is loosely entered by the pin 27 depending from the arm 28 fulcrumed on the SCI'BWPlIl 30 which is threaded into a'boss 31 on top of the cover 22 in substantial alinement with the axis of pivotal moyement 0f the arm '25. The cover 22 is provided 3 with a slot 32 to admit the pin 27, and with stops 33 to limit the swinging movement of the arm 28:

Secured to'the cover-plate 22 of the rheostat B is a bracket 34to the upwardly and forwardly offset extremity of which is pivotally mounted at 35 the bellcrank controller hand-lever C, the rearwardly extending arm 36 of which carries a depending pin 37 which enters the slot 38 in the controllerarm 28. The other arm of the lever G extends horizontally along the front edge of the cloth-plate 9 and terminates in a handle 40 closely adjacent the line of feed f f. The handle 40of the controller-lever d is supported at an elevation slightly above the surface of the cloth plate 9 by means of the block 41 which is secured on top of the front wall of the base 1.

The controller is wired up in'any suitable or usual manner to the motor 18 and connection block 42 which includes a cylindrical portion 43 fitted within an aperture in th rearward wall of the compartment 7 an the source of electrical energy.

. Preparatory to operation, the machine is stationed upon an ordinary table or other suitable support and the cover 2 is removed to expose the sewing head. Nothing further need be done preparatory to sewing than to connect the block 42 to the source of power. After placing the work in the machine the operator merely shifts-the handle 40 from full line position,Fig. 2, toward the dotted line position, thus moving the contactor 25' across one or more of the contact points 24 trol of the lever C may be relinquished and the operators entire attention directed to guiding the work. If a change of speed is desired, it may be readily secured by move ment ofthe handle. 40 either in the direction of feed for a lower speed or in the opposite direction for a higher speed. By virtue of the described disposition of the lever C, these various movements of control may be exercised by the operator without relinquishing'manual control of the work which should be accurately guided to the needle while the machine is #in operation.

'VVhen nearing theend of the scam, the operators hands are naturally moving in the direction of feed as the finger tips follow --the work. Whenthe end of the seam is reached, the palm of the operators right hand comes naturally up to the handle 40 which is easily and naturally shifted in the direction of feed to full .line position, Fig. 2

. to stop the machine; the front corner of the base 1 being preferably beveled off at 46 to permit free manipulation of said lever in the manner described.

The controller'compartment 7 is closed by means of a cover-plate 45 to exclude dustand lint; an accumulation of which would be likely to impair the efiiciency of the controller and might become ignited from sparks at the contact points 24.

Having thus set forth the nature of the invention, what I claim herein is- A) 1. A motor drlven sewing mach1ne comprislng, a sewing head lIlOlllCllIlg st1tchforming and straightaway feeding mechanisms, a drivingmotor, and a motor speed.

controller and connections including a shiftable device located adjacent the line of feed and within reach of the operators forearm or hand Without necessitating removal of the hand from its position in guiding the work,

2. A motor drivensewing machine comprising,,a head including .stitch- IOIIlJlIlg and straightaway feeding mechanisms, a driving motor, and a manually operated motor-speed controller and connections including a handle disposed adjacent the line of seam-formation and shiftable back-and-forth in and opposite to the direction of feed,

A motor driven sewing machine comprising, a sewing head having a fiat clothplate and including stitclrforming and straightaway feeding mechanisms, a driving motor, and a manually operated controller and connections including a handle disposed substantially parallel to the front edge of the cloth-plate.

a. A motor driven sewing machine comprising, a se head formed with a bracket-arm standard and including stitchforming and straightaway feeding mechanisms, a driving motor, and a horizontally operating motor controller and connections including an operating lever fulcrumed on a vertical axis adjacent said standard and ictending toward the line of feed at the front of the machine to a point within reach the operators hand, without necessitating removal of the hand from its position in guiding the work.

A motor driven sewing machine com prising, a sewing head including stitch- :iorming and straightaway feeding mecha nisms, a driving motor, and a motor controller and connections including an operating lever in the form of a bell-crank having an operating handle extending toward the line of feed and within reach of the operatofis hand, without necessitating relinquishment of full manual control of the work being stitched.

6. A portable motor driven sewing machine comprising a rectangular supporting base, a sewing head seated upon said base, a cover for the sewing head adapted to be secured to aid base, a driving motor, anda motor controller and connections including an operating handle located entirely within the periphery of said base when viewed from a position vertically thereabove and adapted to be housed within said cover.

7. A motor driven sewing machine comprising, a supporting base, a sewing head seated upon said base, a driving motor, a motor controlling element including a pivoted contact arm mounted within said base and an operating lever pivoted independ- -independently of said contact-arm and shiftable back and forth in and opposite to the direction of feed, and a motion multiplying connection between said lever and contactarm.

9. A motor driven sewing machine coinprising, a hollow supporting base, a sewing headseated upon said base, a driving motor, and a motor controller including contact Joints and a swinging arm, said controller being'detachably mounted as a unit within said base.

10. A motor driven sewing machine comprising, a hollow supporting base, a partition dividing said base into compartments, a sewing head seated upon said base over one of said compartments, a driving motor, and a motor controlling element housed within the other of said compartments.

11. A motor driven sewing machine comprising, a hollow supporting base, a partition dividing said base into compartments, a sewing head seated upon said base over one of said compartments, a driving motor, and a motor controlling rheostat including contact points and a movable contactor detachably mounted as a unit within the other of said compartments.

In testimony whereof, I have signedmy name to this specification.

MARTIN HEMLEB. 

